JP4272238B2 - Coated bearing manufacturing method and manufacturing apparatus thereof - Google Patents

Description

  The present invention relates to a coated bearing manufacturing method and a manufacturing apparatus for forming a coating layer on a bearing base, and in particular, a coating layer is formed on the inner surface of a cylindrical or semi-cylindrical bearing base using an application roll. It relates to what is filmed.

The coating layer of a coated bearing is usually a coating liquid in which a solid lubricant such as molybdenum disulfide (MoS ₂ ) or graphite (Gr) is mixed with a thermosetting resin such as polyimide (PI), epoxy resin or phenol resin. The film is formed by applying this coating liquid to the inner surface of the bearing substrate.
As a method for applying the coating liquid to the inner surface of the bearing substrate, there are a spray method and a printing method. The spray method is a method in which a coating liquid is sprayed from a spray device in the form of a mist and applied to the inner surface of the bearing substrate. The printing method is a method in which a coating solution is applied to the inner surface of the bearing substrate using a pad or roll. It is.

Patent Document 1 discloses a method of forming a coating layer on the inner surface of a half bearing by printing using a roll (hereinafter, roll printing). This includes a transfer roll, a coating roll (printing roll), and a backup roll. In order to form the coating layer, first, the coating liquid is dropped onto the roll surface of the transfer roll, and the coating liquid is transferred to the coating roll to a uniform thickness by rotating the coating roll in contact with the transfer roll. Subsequently, a half bearing (bearing base material) is sandwiched between the coating roll and the backup roll, and both rolls are rotated. Thereby, a bearing base material passes between both rolls, and the coating liquid of an application | coating roll is apply | coated to the inner surface of a half bearing in the passage process.
JP 2001-304264 A

  In the spray method, the variation in the film thickness is large, and since the coating liquid is sprayed from the spray device in the form of a mist, a large amount of coating liquid is wasted due to scattering. In the printing method, the amount of wasted coating liquid as in the spray method can be extremely reduced. However, among the printing methods, in the case of using a pad, the coating liquid is applied by pressing the pad against the inner surface of the half bearing, so that the thickness accuracy of the coating layer is poor.

  The printing method using a roll disclosed in Patent Document 1 is superior in thickness accuracy of the coating layer as compared with pad printing. However, in the roll printing method of Patent Document 1, the coating liquid is developed on the surface of the coating liquid roll by rotating the transfer roll and the coating roll, that is, by the contact pressure between the transfer roll and the coating roll. However, in the case where the coating liquid is developed by the contact pressure of both rolls, it is difficult to control the coating liquid thickness uniformly over the entire circumference of the coating roll. For this reason, when the coating liquid developed on the surface of the coating roll is applied to the inner surface of the half bearing to form a coating layer, the thickness of the coating layer tends to be uneven.

  Further, in order to sandwich the half bearing between the application roll and the backup roll and apply the paint to the inner surface of the half bearing, the application roll must be moved away from the transfer roll and close to the backup roll. However, when the coating roll is separated from the transfer roll, the coating liquid is attracted and collected in the portion that has been in contact with the transfer roll until then, and as a result, when the coating liquid is applied to the half bearing, There was a problem that a thick part was locally formed.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to uniformly transfer the coating liquid onto the surface of the coating roll, and to collect the coating liquid on the coating roll when the coating roll and the transfer roll are separated from each other. It is an object of the present invention to provide a coated bearing manufacturing method and an apparatus for manufacturing the same, in which a coating layer having a uniform thickness can be formed on a bearing base material without generating a portion.

  The present invention provides a coating bearing manufacturing method in which a coating layer is formed by applying a coating liquid on the inner surface of a cylindrical or semi-cylindrical bearing base material, and the transfer roll having a plurality of recesses formed on the roll surface. After the coating liquid is attached to the roll surface and the excess paint is removed from the roll surface by a doctor blade, the transfer roll and the coating roll are rotated while being in contact with each other, and the coating liquid of the transfer roll is The transfer roll is transferred to the application roll, while the transfer roll is moved relative to the application roll in the radial direction passing through the contact portion between the transfer roll and the application roll. The transfer roll and the application roll are separated from each other by moving the application roll relative to the rotation direction side at the contact portion with the The transfer of the coating liquid from the copying roll to the coating roll is finished, and then the coating roll is brought into contact with the inner surface of the bearing base, and the bearing base is rotated while rotating the coating roll in this contact state. The coating liquid transferred to the coating roll is applied to the inner surface of the bearing substrate by relative movement along the inner surface of the bearing base to form the coating layer (Claim 1).

  The present invention also relates to a transfer roll in which a large number of recesses are formed on the roll surface in a coating bearing manufacturing apparatus in which a coating liquid is applied to the inner surface of a cylindrical or semi-cylindrical bearing substrate. A coating liquid supply means for supplying a coating liquid to the roll surface of the transfer roll in a state where the transfer roll is rotated, a doctor blade for removing excess coating liquid from the roll surface of the transfer roll, A coating roll in which the coating liquid is transferred from the roll surface of the transfer roll by rotating in contact with the transfer roll, and after transferring the coating liquid from the transfer roll to the coating roll, the transfer roll is transferred to the coating roll. On the other hand, the transfer roll is moved relative to the transfer roll while being relatively moved in the radial direction passing through the contact portion between the transfer roll and the application roll. A separation means for separating the transfer roll and the coating roll by moving relative to the rotation direction side of the coating roll at a contact portion with the roll, and the coating roll separated from the transfer roll by the bearing base The coating material transferred to the coating roll is applied to the inner surface of the bearing base material by contacting the inner surface of the material and relatively moving along the inner surface of the bearing base material while rotating the coating roll in this contact state. And a revolution means for forming the coating layer.

  In the coated bearing manufacturing method and the manufacturing apparatus therefor, a plurality of recesses are formed on the roll surface of the transfer roll. When the roll surface of the transfer roll is immersed in, for example, a coating liquid reservoir, the recesses are filled with the coating liquid. Thereafter, the roll surface of the transfer roll is rubbed with a doctor blade to remove excess coating liquid. For this reason, the coating liquid is uniformly attached to the roll surface of the transfer roll, and the coating roll to which the coating liquid is transferred from the transfer roll also has a uniform thickness of coating liquid spread on the surface. Become.

  When the coating liquid is transferred from the transfer roll to the coating roll by rotating while the transfer roll and the coating roll are in contact with each other, the coating roll is then removed from the transfer roll to apply the coating liquid to the inner surface of the half bearing. Be released. At this time, in the present invention, while the transfer roll is moved relative to the application roll in the radial direction passing through the contact portion between the transfer roll and the application roll, the application roll is moved relative to the transfer roll at the contact portion with the transfer roll. The transfer roll and the application roll are separated from each other by relatively moving in the rotation direction side of the application roll.

  The following three forms are conceivable as movement forms of both rolls for realizing this separation method. The first is a form in which both the transfer roll and the application roll are moved (first form), the second is a form in which only the transfer roll is moved (second form), and third, only the application roll is moved. It is a form (third form).

  FIG. 5 shows the first embodiment. If the transfer roll 1 and the coating roll 2 are rotated in the directions of arrows A and B, the transfer roll 1 moves in the radial direction (arrow C direction) passing through the contact portion S of both rolls 1 and 2. The application roll 2 moves in the rotation direction (arrow D direction) of both the rolls 1 and 2 in the contact portion S of the both rolls 1 and 2. The coating roll 2 is driven to rotate by the transfer roll 1.

  In this first separation mode, first, the application roll 2 moves to the transfer surface after the coating liquid has been transferred with respect to the transfer roll 1 (in the direction of arrow D). Does not create a pool of coating liquid on the surface. On the other hand, when the transfer roll 1 moves in the radial direction (arrow C direction) without moving the coating roll 2 to the coating liquid transferred side, the coating roll 2 is coated on the roll surface of the transfer roll 1 and the roll surface of the coating roll 2. There is a place where the liquid has accumulated locally. By moving the coating roll 2 in the direction of arrow D, it is possible to prevent the occurrence of such a coating liquid pool as much as possible. The coating roll 2 moves in the direction of the arrow C while moving slightly in the direction of the arrow D while sliding slightly on the surface of the transfer roll 1. There is no fear of being collected.

  FIG. 6 and FIG. 7 show the second and third modes described above. In these, the movement of both rolls 1 and 2 in the first mode is performed only by the transfer roll 1 or only by the coating roll 2. In the case of FIG. 6 in which only the transfer roll 1 is moved, the transfer roll 1 is moved obliquely upward indicated by the arrow E, and in the case of FIG. 7 in which only the application roll 2 is moved, the application roll 2 is moved to the arrow. It is moved diagonally downward as indicated by F. In the second and third modes of FIGS. 6 and 7, the same coating liquid accumulation preventing effect as that of the first mode can be obtained.

  And the transfer effect of the uniform coating liquid to the coating roller by the concave portion of the roll surface of the transfer roll as described above, and the effect of preventing the occurrence of local coating liquid pooling of the coating roll due to the above-mentioned separation movement of both rolls In combination with this, a coating layer having a uniform thickness can be formed on the inner surface of the bearing substrate by the transfer roll.

  Each of the concave portions (usually referred to as cells) on the roll surface of the transfer roll described above is an extremely small square pyramid, for example. These recesses are preferably not connected to each other and are independent from each other (claim 2). By being independent, the amount of coating liquid held in each recess is fixed. Thereby, the thickness of the coating liquid transferred to the coating roll can be made even more uniform.

The total internal volume of the recesses of the transfer roll is preferably ⁵ to 40 cm ³ / m ² (Claim 3). FIG. 8 shows the total inner volume of the recesses per unit area of the transfer roll when the coating liquid is transferred from the transfer roll to the application roll and further applied to the inner surface of the half bearing by the application roll. It is the graph which showed the relationship with the film thickness of a coating layer. From the graph of FIG. 8, it is understood that the film thickness of the coating layer can be controlled by changing the total internal volume of the recesses until the total internal volume of the recesses is about 5 to 40 cm ³ / m ² . When it exceeds 40 cm ³ / m ² , the coating layer does not increase in thickness even if the internal volume increases, and the thickness is constant, so the total internal volume of the recesses has an upper limit of 40 cm ³ / m ^2. It is preferable to do.

  When the coating liquid is transferred from the transfer roll to the application roll, it is preferable that the application roll rotates in contact with the transfer roll one or more times. The coating roll is pressed against the transfer roll with an appropriate pressure and rotates with each other, whereby the coating liquid is transferred from the recess on the roll surface of the transfer roll to the coating roll. At this time, uniform transfer of the coating liquid to the coating roll is performed more satisfactorily by rotating the coating roll once or more. In other words, if the coating liquid is transferred from the transfer roll in the first rotation of the coating roll, but a thin portion of the coating liquid is formed on the surface of the coating roll, the portion is removed from the transfer roller by the subsequent rotation. This is because the thickness of the coating liquid on the surface of the coating roll is made uniform by receiving the transfer of the coating liquid.

  As for the hardness of the roll surface of an application roll, Hs30-80 are preferable (Claim 5). The half bearing is designed to have a required size and shape in a state where it is assembled to a housing such as a connecting rod with a predetermined tightening force. For this reason, it is preferable to absorb the variation in the surface shape of the half bearings which are individually different depending on the case by elastic deformation of the roll surface of the coating roll. By setting the hardness of the roll surface of the coating roll to Hs30 to 80, the variation in the surface shape of the half bearing as described above can be absorbed by the coating roll, which can contribute to the uniform thickness of the coating layer. .

  Furthermore, it is preferable that the half bearing is fixed to a jig when the coating liquid is applied to the half bearing by the application roll. If the half bearing is fixed to the jig, the half bearing can be kept in a stable state, and the coating liquid can be applied in the same state as when the half bearing is fixed to the housing. This further contributes to the uniform thickness of the coating layer.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. In the present embodiment, as shown in FIG. 4, a half bearing 5 formed by lining a bearing alloy layer 4 such as Cu-based or Al-based on the inner surface of the back metal layer 3 is an application target of the coating liquid. An application device 6 for applying a coating liquid to the inner surface of the half bearing 5 is shown in FIG. 1 and is mainly composed of the transfer roll 1 and the application roll 2 described above.

The transfer roll 1 is provided at a fixed position and is driven to rotate in the direction of arrow A at a constant speed around a shaft 1a by a motor (not shown). On the roll surface of the transfer roll 1, a large number of recesses for storing the coating liquid, for example, quadrangular pyramid recesses 7 as shown in FIG. 3 are formed adjacent to each other in the axial direction and the circumferential direction. These recesses 7 are independent from each other, and there is no passage connecting the recesses 7. The concave portion 7 has, for example, a length L and a width W of about 50 to 500 μm and a depth D of about 15 to 120 μm, respectively, and the total internal volume is determined to be ⁵ to 40 cm ³ / m ² . The total internal volume of the recesses 7 per unit area is appropriately determined in accordance with the thickness of the coating layer applied to the inner surface of the half bearing 5 within the above range.

  Next to the transfer roll 1, a coating liquid tank 8 is provided side by side. As shown in FIG. 2, one side surface of the coating liquid tank 8 on the transfer roll 1 side is open. The open end surfaces of the left and right side walls of the side surface are formed as concave curved surfaces having the same curvature as that of the roll surface of the transfer roll 1. Further, the bottom surface of the coating liquid tank 8 is constituted by, for example, a metallic thin plate 9. The tip of the thin plate 9 slightly protrudes from the side surface of the coating liquid tank 8.

  Such a coating liquid tank 8 functions as a coating liquid supply means for supplying a coating liquid to the transfer roll 1, and the concave curved end surfaces 8a, 8a on both sides of the side surface are transferred as shown in FIG. The roll 1 is in contact with the roll surface. Accordingly, the side surface of the coating liquid tank 8 is closed by the transfer roll 1, and the roll surface of the transfer roll 1 is immersed in the coating liquid stored in the coating liquid tank 8. ing. The tip of the thin plate 9 on the bottom surface is elastically deformed so as to be in contact with the roll surface of the transfer roll 1 and bend downward. The tip of such a thin plate 9 is pressed against the roll surface of the transfer roll 1 by its own elastic restoring force, and functions as a doctor blade 10 that removes excess coating liquid from the roll surface when the transfer roll 1 rotates. .

As the coating liquid stored in the coating liquid tank 8, for example, a base resin containing a solid lubricant and diluted with an organic solvent is used. As the base resin, thermosetting resin such as polyimide (PI), epoxy resin or phenol resin, or heat resistant resin such as polyamideimide (PAI) or polybenzimidazole (PBI) is used. As the solid lubricant, molybdenum disulfide (MoS ₂ ), graphite (Gr), polytetrafluoroethylene (PTFE), tungsten disulfide (WS ₂ ), boron nitride (BN), or the like is used. The viscosity of the coating liquid may be adjusted to 200 to 3000 m · Pa / sec, preferably 500 to 2000 m · Pa / sec.

  The transfer roll 1 is integrated with the coating liquid tank 8 and moved up and down together with the coating liquid tank 8 by an elevating device. In this embodiment, the transfer roll 1 is always rotated, including when it is raised and lowered, and the coating liquid stored in the coating liquid tank 8 is stirred by this rotation. And the coating liquid does not raise | generate segregation by this stirring, but the whole is kept in the homogeneous state.

  On the other hand, the roll surface of the application roller 2 is finished to be a smooth surface. The application roll 2 is rotatably supported by a shaft 2 a below the transfer roll 1 at the tip of an arm 12 capable of circular motion (revolution motion) about the shaft 11. The circular motion of the arm 12 is performed by a rotating device (not shown). The roll surface of the application roll 2 is configured to come into contact with the roll surface of the transfer roll 1 with a predetermined pressure in a state where the arm 12 is turned right above. The roll surface of such an application roll 2 is made of, for example, a relatively soft plastic and has a hardness of Hs30-80. The arm 12 makes a circular motion using a motor (not shown) as a drive source to cause the coating roll 2 to revolve.

  A jig 13 is disposed below the shaft 11 of the arm 12. The half bearing 5 is detachably fixed to the semicircular recess 13 a of the jig 13. Then, in a state where the half bearing 5 is fixed to the jig 13, the roll surface of the coating roll 2 that is circularly moved (revolved) by the arm 12 is configured to contact the inner peripheral surface of the half bearing 5. Yes. When the coating roll 2 is in contact with the inner peripheral surface of the half bearing 5, the coating roll 2 is revolved while receiving rotation and rotating.

  Here, the lifting device that moves the transfer roll 1 up and down and the rotating device that moves the coating roll 2 in a circular manner are separated so that the transfer roll 1 and the coating roll 2 that rotate in contact with each other are separated, as will be understood from the following description. Functions as a means. Further, the rotating device functions as a revolving means for moving the coating roll 2 along the inner surface of the half bearing 5.

  Next, an operation when the coating liquid is applied to the inner surface of the half bearing 5 by the coating device 6 having the above-described configuration will be described. First, the coating liquid is stored in the coating liquid tank 8. Further, the half bearing 5 is fixed to the jig 13. Then, the transfer roll 1 is stopped at the lowest lowered position, and the arm 12 is stopped at a position that is pivoted vertically upward to bring the application roller 2 into contact with the lower side of the transfer roll 1. The transfer roll 1 is driven to rotate by a motor (not shown). When the application roll 2 comes into contact with the transfer roll 1, the application roll 2 also receives rotational force from the transfer roll 1 and rotates.

  In the transfer roll 1 and the coating roll 2 rotating in contact as described above, the transfer roll 1 fills the concave portion 7 with the coating liquid by being immersed in the coating liquid stored in the coating liquid tank 8. When the portion filled with the coating liquid in the recess 7 of the transfer roll 1 is exposed downward from the coating liquid tank 8 as the arrow A rotates, the doctor blade 10 scrapes off the excess coating liquid on the roll surface. (Coating liquid adhesion process).

  Then, the coating roll 2 comes into contact with the roll surface from which the excess coating liquid on the transfer roll 1 has been scraped off and rotates, whereby the coating liquid in the recess 7 is transferred to the coating roll 2. Even if the coating liquid immediately after being transferred to the coating roll 2 becomes uneven due to the recess 7, the coating liquid 2 immediately becomes uneven due to its fluidity and becomes a smooth surface following the roll surface of the application roll 2.

  When the transfer roll 1 and the coating roll 2 each make one or more revolutions and the coating liquid is uniformly transferred to the roll surface of the coating roll 2, the transfer roll 1 is then moved upward (in the direction of arrow C) by a lifting device (not shown). Moved to. As the transfer roll 1 moves upward, the arm 12 starts to rotate counterclockwise in FIG.

  By the rotation of the arm 12, the coating roll 2 moves in the direction of arrow D along the tangent line of the contact portion S of both rollers 1 and 2 at the contact portion S with the transfer roller 1. As a result, the application roll 2 moves in the same direction as the rotation direction with respect to the transfer roll 1 that is moving away from the application roll 2, so that the application roll 2 is applied to the surface of the roll. Thus, the coating film 1 moves away from the transfer roll 1 without forming a coating liquid reservoir in which the thickness of the coating film increases locally (separation process). For this reason, the coating liquid transferred to the roll surface of the coating roll 2 becomes a coating liquid transfer film having a uniform thickness over the entire circumference.

  Even after the coating roll 2 is separated from the transfer roll 1, the arm 12 is rotated counterclockwise. Thereby, the application roller 2 comes into contact with the inner surface of the half bearing 5 fixed to the jig 13. Then, since the application roll 2 moves along the inner peripheral surface of the half bearing 5 while rotating, the coating liquid on the roll surface of the application roll 2 is applied to the inner peripheral surface of the half bearing 5 and coated. A film is formed as a layer (application process). Thereafter, the arm 12 turns to a state where the arm 12 is straight upward, and the application roller 2 is brought into contact with the lower portion of the transfer roll 1 lowered to the lowest position to prepare for the application of the application liquid to the next half bearing 5.

The half bearing 5 with the coating liquid applied to the inner surface is removed from the jig 13 and conveyed in turn to a drying furnace and a baking furnace, where the coating layer is dried and fired.
Thus, in this embodiment, since the coating liquid can be uniformly transferred to the roll surface of the application roll 2, a coating layer having a uniform thickness can be formed on the half bearing 5. In order to confirm the effect of the present invention, the inventor formed a coating layer according to the present invention (Example product), and formed a coating layer by a conventional method (Comparative product). The film thickness was measured. Table 1 shows the results of film thickness measurement of the example product and the comparative example product.

  Here, the conventional method is the same as that of Patent Document 1 described above, and is as follows. That is, first, the coating liquid is supplied to the roll surface of the transfer roll, and the transfer roll and the coating roll are contact-rotated to spread the coating liquid uniformly on the surface of the coating roll. Thereafter, the coating roll is separated from the transfer roll, the half bearing is sandwiched between the backup roll and the coating roll and the backup roll are rotated, and the coating liquid developed on the roll surface of the coating roll is applied to the inner surface of the half bearing. It is to apply to.

  In Table 1, when the film thickness measurement location is indicated by the half bearing 5 in FIG. 4, the end portion (A) is the location indicated by (A) near one end in the circumferential direction, and the center (U) is: The portion indicated by (c) at the center in the circumferential direction and the end portion (b) are the portions indicated by (b) near the other end in the circumferential direction. Further, the film thickness was measured as a whole along the circumferential direction, and the maximum difference between the thicknesses of the film thickness was expressed as a non-uniformity portion where the film thickness changed greatly.

  As understood from Table 1, in the comparative product, the film thicknesses at the locations (a) and (b) near both ends are thinner than at the center. This is because the contact area between the coating roll and the half bearing is small when the half bearing starts to be sandwiched between the coating roll and the backup roll and when the half bearing is pulled out between the two rolls. This is because the film thickness tends to be thin because the pressure also changes. Moreover, the film thickness change of the unevenness generation part is large, which is considered that the coating liquid pool is generated in the coating roller, and this is the unevenness generation part.

  On the other hand, in the example product, the portions (a) and (b) near both ends of the half bearing can be made to have the same film thickness as the center (c), and there is no occurrence of unevenness. It is understood that the coating method according to the present invention is a better method for forming a coating layer having a uniform thickness.

The present invention is not limited to the embodiments described above and shown in the drawings, and can be expanded or changed as follows.
The transfer roll 1 and the application roll 2 are separated by moving only the transfer roll 1 obliquely upward as shown in FIG. 6, or by moving only the application roll 2 obliquely downward as shown in FIG. It may be.
The bearing base material to which the coating liquid is applied may be cylindrical. In this case, the application roll 2 can be moved in the direction of the axis 11 together with the arm 12, the application roll 2 and the arm 12 are arranged in the cylindrical bearing by the axial movement, and the arm 12 is moved circularly. good.

Schematic configuration diagram of a coating apparatus showing an embodiment of the present invention Perspective view of a single tank (A) is an enlarged view showing a roll surface of a transfer roll, and (b) is a sectional view. Side view of half bearing Schematic which shows the 1st form of separation operation | movement of a transfer roll and an application | coating roll Schematic showing the second embodiment Schematic showing the third embodiment Graph showing the relationship between the total volume of recesses per unit area on the roll surface and the coating layer thickness

Explanation of symbols

  In the drawings, 1 is a transfer roll, 2 is a coating roll, 5 is a half bearing, 6 is a coating device, 7 is a recess, 8 is a coating liquid tank, 10 is a doctor blade, 12 is an arm, and 13 is a jig.

Claims (7)

In a coated bearing manufacturing method in which a coating layer is formed by applying a coating liquid on the inner surface of a cylindrical or semi-cylindrical bearing base,
After the coating liquid is attached to the roll surface of the transfer roll in which a large number of recesses are formed on the roll surface, and the excess paint is removed from the roll surface by a doctor blade,
The transfer roll and the coating roll are rotated while being in contact with each other to transfer the coating liquid of the transfer roll to the coating roll,
While moving the transfer roll relative to the application roll in the radial direction passing through the contact portion between the transfer roll and the application roll, the application roll is moved relative to the transfer roll at the contact portion with the transfer roll. By moving the application roll relative to the rotation direction side, the transfer roll and the application roll are separated from each other to finish the transfer of the coating liquid from the transfer roll to the application roll,
Thereafter, the coating roll is brought into contact with the inner surface of the bearing base material, and in this contact state, the coating roll is rotated and relatively moved along the inner surface of the bearing base material, thereby being transferred to the coating roll. A coating bearing manufacturing method, wherein the coating layer is formed by coating the coating liquid on the inner surface of the bearing substrate.   The coated bearing manufacturing method according to claim 1, wherein the plurality of recesses formed on the roll surface of the transfer roll are independent of each other. ^3. The coated bearing manufacturing method according to claim 1, wherein a total inner volume of the plurality of concave portions formed on the roll surface of the transfer roll is 5 to 40 cm ³ / m ² .   4. The coated bearing production according to claim 1, wherein when the coating liquid of the transfer roll is transferred to the coating roll, the coating roll rotates in contact with the transfer roll for one or more rotations. Method.   The coated bearing manufacturing method according to any one of claims 1 to 4, wherein the hardness of the roll surface of the coating roll is Hs30-80.   The coated bearing manufacturing method according to claim 1, wherein the bearing base is applied to the coating liquid by the coating roll while being fixed to a jig. In a coated bearing manufacturing apparatus that coats a coating liquid on the inner surface of a cylindrical or semi-cylindrical bearing base material,
A transfer roll having a large number of recesses on the roll surface;
A coating liquid supply means for supplying a coating liquid to the roll surface of the transfer roll in a state where the transfer roll is rotated;
A doctor blade for removing excess coating liquid from the roll surface of the transfer roll;
A coating roll in which a coating liquid is transferred from the roll surface of the transfer roll by rotating while in contact with the transfer roll;
After transferring the coating liquid from the transfer roll to the application roll, the transfer roll is moved relative to the application roll in the radial direction passing through the contact portion between the transfer roll and the application roll. Separating means for separating the transfer roll and the application roll by moving the transfer roll relative to the rotation direction side of the application roll at the contact portion with the transfer roll;
The application roll separated from the transfer roll is brought into contact with the inner surface of the bearing base, and the application roll is relatively moved along the inner surface of the bearing base while rotating the application roll in this contact state. And a revolving means for applying the coating material transferred onto the inner surface of the bearing base material to form the coating layer.

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